Forty Mile: Climate
Conservation staff set up sprinklers when forest fires threatened the townsite in 2006.
Yukon Government photo
The climate of the Forty Mile site is similar to that at Dawson City. The summers are hot, sunny and short while winters are long and cold. Humidity and precipitation are moderate year round. In nearby Eagle, Alaska (70 km downstream), temperatures from – 45.6 C (–50 F) to –51.1 C (– 60 F) are common and temperatures as low as –59.4 C (–75 F) have been recorded.
People in charge of the historic site understand how the severe climate may be affecting the heritage buildings and structures. Long periods of heavy snow loads may cause structures to collapse. Summer warmth and humidity can also contribute to deterioration of wood elements. Hot dry summers can lead to forest fires, two of which threatened the community in 1986 and 2006.